Boiler



(No Model.) s Sheets-Sheet 1.

S. 'P. HEDGES. BOILER.

No. 537,770. Patented'Apr. 16, 1895.

WITNESSES: IVE/VTOH By M ATTORNEYS.

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3 sheets-sheet 2.

'S fP, HEDGE-S.

BOILER.

Pate ted Apr. 16, 1895.

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(No Model.) P. HEDGES' 3Sheets-Shet a.

BOILER.

A No. 537,770.

Patented Apr. 16, 189 5.

'I I I I I I I I I I I I I I I I I I I I I I I I I I I IN I 1 /II//IIII IN 5 N TOR ATTORNEYS.

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States FFIQE.

SAMUEL P. HEDGES, OF GREENPORT, NEW YORK.

BOILER.

SPECIFICATION forming part of Letters Patent No. 537,770, dated April 16, 1895.

Application filed February 5 1895. Serial No. 537,373- (No model.)

invention is to provide a boiler which will be compact and in no manner top-heavy, and in which the fire box will be composed mainly of water tubes, and wherein other tubes, affording circulation for water, will belocated immediately over the said tubular fire box.

Another object of the invention is to so arrange the fire box and circulating tubes relative to the mud drums and steam drum, that a perfect and even circulation will be secured,- and to so construct the heating pipes as to render them accessible for repairs, there being no part or tube of the boiler that can not be readily reached, or taken out and another put in, or plugged, without affecting the operation of the boiler. are so grouped that any one or more of the sections may be taken out into the fire room Without disturbing any portion of the boiler, a blank header being introduced in its place until the section can be replaced, permitting the boiler to be fired up at once and continue in use until the repairs are made in the section to be replaced. The fire tubes can all be reached from the fire box, taken out and others substituted, and the holes plugged with the tools ordinarily carried on' steam vessels, or usually at hand in the boiler room.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth,

, and pointed out in the claims.

Referenceis to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical section through the casing of the boiler showing the. interior, namely, the fire-box tubes and circulating tubes, together with the steamdrumsand The circulating pipes 'ting.

header drum in side elevation. Fig. 2 is a transverse section through the casing of the boiler, illustrating the tubing thereof from the front. Fig. 3 is a view similar to that shown in Fig. 2, but illustrating, the tubing from the rear. Fig. 4 is a horizontal section taken through the main fire pipe or header of the fire box. Fig. 5 is asection taken through the forward section of the main header transversely, and .illustrates the manner in which sections of the circulating pipes are detachably connected with said drum or fire box header. Fig. 6 is asection taken substantially on the line 66 of Fig. 5; and Fig. 7 is a section taken vertically through one of the return heads of a circulating section.

The mud drums A are two in number, and are located one at each side of the bottom portion of the boiler. These drums are made of extra heavy wrought iron tubing, or steel casings, and the fire box tubes B are tapped in the said mud drums. The fire box tubes B are likewisetapped into a horizontal drum 0, located longitudinally over the upper central portion of the fire box, and this fire box drum '0 is provided preferably at its forward end with a branch 0, extending in direction of the sides of the boiler, whereby the branch and main drums combinedly form substantially a T. The two fire box drums O and 0', although connected, may be denominated the drum 0 as the fire box drum and the drum 0 as a header drurn,this distinction being made to facilitate further description of the boiler. Each of the fire box tubes B comprises a vertical section 10 and a horizontal section 11, the two sections being connected at their point of juncture by an elbow 12, or like fit- The lower ends of the vertical sections of the fire box tubes are, as heretofore stated, tapped into the mud drums, being held in place by suitablelock or jam nuts 13; and the inner ends of the upper or horizontal sections 11 of the said fire bo'x tubes are in like manner tapped into the side surfaces of the fire box drum 0, as shown in Fig. 4, the lock or jam nuts being designated as 13*.

In order to facilitate a rapid and thorough circulation of water in the mud drums and in the extreme ends of the header drum 0, the extremities of the header drum are connected with the end portions of the mud drums through tubular columns 14, or pipes of greater diameter than the fire box tubes 15. It will thus be observed that the fire box may be made up entirely of the tire tubes B, the fire box drum and header drum 0 and C, and the mud drums A, and that therefore all of the heat from the fire is utilized to a maximum degree.

The grate D may be supported within the fire box in any well-known manner.

The circulating pipes E are made up in sections placed close together over the fire box and extending longitudinally thereof; and each section of circulating tubes consists of any desired number of coils or returns, embracing a series of tubes 15 of suitable length, expanded or otherwise secured at their ends in return bends 16, hollow head blocks or the equivalents thereof, one of which is shown in enlarged sectional view in Fig. 7. Each return bend is provided upon its inner face with two openings 17 at predetermined distances apart, receiving the ends of the tubes or pipes 15; and in the outer face of each return bend or head block two openings 18 are made, corresponding to the openings 17 receiving the said pipes 15, and the said outer openings 18 are normally closed by screw plugs 19, enabling one to gain ready access to the tubes in order that their ends may be expanded if desired.

Preferably at the frontof the boiler, the uppermost and lowermost return bend or head block is fitted to receive a single tube only, and the lowermost head blocks or return bends are secured upon and made to communicate with the header drum (3' at the front of the fire box, while the uppermost return bend or head block 16 is made to connect in like manner with a second header drum G which is in direct communication with a steam dome or drum C the communication being made at the front of the steam drum, while at the rear portion of the said steam drum return pipes 20 are carried downward to a connection one with the rear end of each mud drum A, as shown in Figs. 1 and 3.

The connection between the header drums O and C and the sections of the circulating tubesE is made in a peculiar manner, and in a manner which will admit of any one or more sectionsbeing expeditiously and conveniently removed without interfering with adjoining sections; and the manner in which the attachment is made between the circulating tubes and the header drums will enable the openings in the latter to be plugged, or otherwise closed, until the injured circulating section can be replaced, therefore admitting of the boiler being used while repairs are being carried forward.

The preferred manner of connecting the sections of circulating tubes with the header drums, is illustrated in Figs. 5 and 6, in which it will be observed that upon the lower faces of the lower return bends or head blocks 16 and the upper faces of the upper return bends or head blocks a collar 21 is produced, which is introduced into openings 22 made in the said header drums, the openings in the lower drums being in the top, and the corresponding openings in the upper drum are made in its lower face. The said terminal return bends or head blocks are seated upon suitable packing 23, whereby a steam-tight joint is made, and the said terminal return bends or head blocks are placed close together, and the series will extend practically from one end of a header drum to the other.

In opposing faces of abutting terminal return bends or head blocks, vertical semi-circular grooves 2 are produced, shown best in Fig. 4, and the terminal blocks are held in steam-tight connection with the header drums by means of bolts 25, which are passed through the grooves or recesses 2t 0t abutting return bends, and are screwed into the solid portions of the header drums between the openings 22 made therein to receive the shoulders of the said terminal return bends as is clearly shown in Fig. 6. Therefore, when any circulating section is to be removed, all that is necessary is to remove the bolt 25 holding the section in place.

It is obvious from the foregoing description that any circulating section can be readily removed, and the opening left thereby in the boiler be plugged orotherwise closed,and the boiler continued in use,and that the removal or replacement of these sections may be expeditiously effected. Furthermore, any tubing in the entire boiler maybe as readily reached as the circulating tubes for purposes of repair; and it is further obvious that the circulation of a boiler such as has been described will be perfect, ample provision having been made for alarge volume of water to circulate at the extreme ends of the lower header drum when it is used. Again, the boiler is exceedingly simple in its entire construction, may be economically built, and is of verycompact form.

I further desire it to be understood that various modifications may be made in the construction of the boiler Without departing from the spirit of the invention, as, for example, the circulating connection between the header drums may be varied, and simple elbows may be substituted for the return bends or head blocks of said sections, and the header drums may be differently located with respect to the steam drum and the fire box drum.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a boiler, the combination with a fire box constructed of water tubes and a drum extending longitudinally at the upper part of the fire box and with which the said water tubes are connected, the said drum forming a portion of the fire box, of a steam drum, a return connection between the steam drum and the tubes of the fire box, and circulating tubes or pipes connecting the steam drum, with the said fire box drum, as and for the purpose set forth.

2. In a boiler construction, the combination with a fire box having a drum located at the upper portion of the same and adapted to contain water, the said drum forming a portion of the fire box, and a cross or header drum connected with one end of the fire box drum, of a steam drum, a header drum connected therewith and circulating pipes con- .necting the two header drums, as and for the purpose set forth.

3. In a boiler, the combination with the mud drums, a drum arranged horizontally in the upper part of the fire box and forming a portion thereof, and a cross or header drum at one end of the fire box drum of fire box tubes connecting the mud drums with the fire box drum and with the header drum, as and for the purpose specified.

4. In the construction of boilers, the combination with a water carrying drum located in the upper part of the fire box, a steam drum and a header or cross drum connected with one end of the fire box drum, of mud drum fire tubes connecting the fire box drum and cross drum, a return connection between the mud drum and steam drum and circulating tubes constructed in sections, the sections being independently and removably connected with the cross drums and steam drum, substantially as described.

5. In a boiler, the combination, with a fire box of which a drum constitutes a part, and a header or cross drum connected with the fire box drum,ofasteam drum, a header drum connected therewith and located above the header drum connected with the fire box drum, circulating pipes connecting the two header drums, the said pipes being arranged in series forming sections, each section having independcut and detachable connection with the said headerdrurns, and a return between the steam drum and the fire box tubes, as and for the purpose specified.

6. In a boiler construction, the combination with a fire box comprisingan upper drum adapted to contain water and located longitudinally at the upper central part of the fire box, mud drums, and fire box tubes connecting the mud drums and the upper drum, of a Steam drum, coils of circulating pipes connecting the steam drum, with the fire box drum, the said coils being detachably secured in place, and a return connection between the mud drums and the said steam drum, as and for the purpose set forth.

7. In a boiler, the combination with the mud drums located at each side of the bottom portion of the boiler, of the fire box drum extending longitudinally over the upper central portion of the fire box, a cross or header drum at the front end of the fire box drum, fire box tubes each having a vertical section connected at its lower end to the mud drum, and a horizontal section connected atits inner end to the fire box drum, vertical pipes of greater diameter than the fire box tubes and connecting the header drum with the end portions of the mud drums, a steam drum, a header drum connected with the front end of the steam drum, circulating pipes arranged above the fire box and extending longitudinally thereof, the said pipes being connected at their upper ends to the header drum at the front of the steam drum and at their lower ends to the header drum in front of the fire box, and return pipes leading from the rear of the steam-drum to the rear ends of the mud drums, as and for the purpose set forth.

8. In the construction of boilers, the combination, with a water-carrying drum located in the fire box, a steam drum,a header or cross drum connected with the fire box drum, and a second header or cross drum connected with the steam drum, of hollow -head blocks entered into apertures produced in theheader drums, a bolt located between each two adjacent head blocks, securing them to the drums of which they are .to form a part, and circulating pipes arranged in coils, the ends of the coils being secured in corresponding head blocks in the two header drums, as and for the purpose specified.

SAMUEL P. I-IEDGES.

Witnesses:

FRED L. TERRY,

J. FRANK TERRY. 

